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https://issues.apache.org/jira/browse/HIVE-19820?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16543814#comment-16543814
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Sergey Shelukhin commented on HIVE-19820:
-----------------------------------------
Fixed the issue where merge was not working correctly due to isCompliant flag,
and also changed merge to be more strict for txn stats (in particular, always
set stats to invalid if stats cannot be merged)
> add ACID stats support to background stats updater and fix bunch of edge
> cases found in SU tests
> ------------------------------------------------------------------------------------------------
>
> Key: HIVE-19820
> URL: https://issues.apache.org/jira/browse/HIVE-19820
> Project: Hive
> Issue Type: Sub-task
> Reporter: Sergey Shelukhin
> Assignee: Sergey Shelukhin
> Priority: Major
> Attachments: HIVE-19820.01-master-txnstats.patch,
> HIVE-19820.01.patch, HIVE-19820.02-master-txnstats.patch,
> HIVE-19820.03-master-txnstats.patch, HIVE-19820.04-master-txnstats.patch,
> HIVE-19820.04.patch, HIVE-19820.patch, branch-19820.02.nogen.patch,
> branch-19820.03.nogen.patch, branch-19820.nogen.patch,
> branch-19820.nogen.patch
>
>
> Follow-up from HIVE-19418.
> Right now it checks whether stats are valid in an old-fashioned way... and
> also gets ACID state, and discards it without using.
> When ACID stats are implemented, ACID state needs to be used to do
> version-aware valid stats checks.
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